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10/15/2026

AI Developer Releases Open-Source Microsoft Office Clones Built With Claude

What happened: Developer Brandon Thomas released three open-source clones of Microsoft Word, Excel, and PowerPoint—WordCraft, GridCraft, and DeckCraft—built in Rust with significant code contributions

AI Developer Releases Open-Source Microsoft Office Clones Built With Claude

What happened: Developer Brandon Thomas released three open-source clones of Microsoft Word, Excel, and PowerPoint—WordCraft, GridCraft, and DeckCraft—built in Rust with significant code contributions from Anthropic’s Claude Opus 5.5 AI model. The projects reportedly cover 87–93% of Word ribbon commands, 96% of Excel worksheet functions, and 79% of PowerPoint features, though they are considered 50–60% real-work ready. The apps read and write native Office formats and are available under permissive open-source licenses.

Why it matters: This rapid, AI-assisted development of complex productivity software highlights the accelerating pace and cost-efficiency of AI-driven software cloning. While the clones are still in alpha and not ready for production use, they demonstrate the feasibility of open-source alternatives to proprietary office suites. The project also raises questions about the future of software licensing, intellectual property, and the role of AI in code generation.

Source: Decrypt